Market street, Newark, New Jersey Location Founded in 2001, the NJ Heart/ NJ MedCare is one of the largest multi-specialty physician group in New Jersey. BOOK APPOINTMENT Market street, Newark NJ Office 635 market street Newark, NJ 07105 Phone: 973-344-5454 Fax: 973-344-5488 Physicians in this office Jasjit S. Walia, MD, M.B.A., F.A.C.C. Maria Koliver, M.D. Denise Mejia, PA-C James Pang, PA-C Lauretta Chigboh NP Office Hours Monday & Wednesday - 8:30am-6:00pm Tuesday & Thursday - 8:30am-5:00pm Friday - 7:30am-4:00pm